Comparison of the moisture damage of bituminous binder coupled with glass and limestone substrate using pull-off test

In this paper, the moisture susceptibility of different bituminous binders with two substrates (glass and limestone) was investigated. To that end, the tensile strength of different combinations of bituminous binder–substrate bond was measured using a pull-off test. This test was adapted from the pneumatic adhesion tensile testing instrument (PATTI) test to improve repeatability. Samples were tested in dry condition and after a 7-day conditioning in hot water bath (60 °C). An analysis of variance (ANOVA) was performed on the test results. Overall, the results show that in dry condition, the pull-off strength is a function of the bituminous binder type rather than of the substrate type. After water conditioning, an increase in the pull-off strength was observed for the bituminous binder without polymers and coupled with glass substrate. This was associated with an increase in binder stiffness. For the limestone substrate, the effect of water conditioning was significant only for one type of binder.

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Nanoscale Quantification of Moisture Susceptibility of Paving Asphalts

MATEC Web of Conferences ◽

10.1051/matecconf/201927103005 ◽

2019 ◽

Vol 271 ◽

pp. 03005 ◽

Cited By ~ 2

Author(s):

Sumon Roy ◽

Zahid Hossain

Keyword(s):

Water Immersion ◽

Moisture Damage ◽

Asphalt Binders ◽

Test Results ◽

Moisture Susceptibility ◽

Performance Grade ◽

Atomic Force ◽

Modified Binders ◽

Study Test ◽

Styrene Butadiene

Moisture-induced damage due to stripping is one of the major concerns to the highway agencies in recent years. In this study, nanoscopic investigations were carried out to examine the effects of moisture in asphalt binders. An Atomic Force Microscope (AFM) was used to estimate the asphalt binder’s modulus and adhesion values, which were believed to be indicators of binder’s resistance to moisture damage. To this end, two Performance Grade (PG) binders and their modified counterparts using polyphosphoric acid (PPA), styrene-butadiene-styrene (SBS), and SBS plus PPA were tested in this study. Test results show significant reductions of adhesion and modulus values after water immersion of the asphalt binders. AFM data also reveals that SBS-modified binders exhibit better moisture resistance compared to the base binder. Findings of this study are expected to help transportation professionals to achieve a better understanding of moisture damage of asphalt binders at a molecular level and their suitability in pavements.

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Issues Pertaining to Use of Superpave Gyratory Compactor

Transportation Research Record Journal of the Transportation Research Board ◽

10.1177/0361198196154300118 ◽

1996 ◽

Vol 1543 (1) ◽

pp. 139-144 ◽

Cited By ~ 5

Author(s):

Robert B. McGennis ◽

R. Michael Anderson ◽

Dario Perdomo ◽

Pamela Turner

Keyword(s):

Critical Factor ◽

Moisture Damage ◽

Experimental Program ◽

Test Results ◽

Short Term ◽

Moisture Susceptibility ◽

Aging Period ◽

Superpave Gyratory Compactor ◽

Modified Binder ◽

Aashto T283

Agencies, industry, academia, and others are rapidly implementing the products of the asphalt research portion of the Strategic Highway Research Program, products collectively referred to as Superpave. One of the principal products has been the Superpave gyratory compactor (SGC). The results of an experimental program, conducted at the Asphalt Institute Research Center in Lexington, Kentucky, and aimed at assessing the effect of various compaction parameters on SGC test results, are outlined. Compaction results were most often different when different mold diameters were used. The length of the laboratory short-term aging period also affected test results. Compaction temperature was a critical factor when a modified binder was used. SGC affected moisture-susceptibility test results although specimens fabricated using SGC were successfully demonstrated to predict moisture damage using the AASHTO T283 protocol. The experiment also compared the compaction characteristics of several different units. This comparison demonstrated minor to moderate differences in test results when the same mix was evaluated.

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Moisture susceptibility of WMA mixes with modified bituminous binders

Petroleum Science and Technology ◽

10.1080/10916466.2017.1303721 ◽

2017 ◽

Vol 35 (10) ◽

pp. 1014-1021 ◽

Cited By ~ 3

Author(s):

Ashok Julaganti ◽

Rajan Choudhary ◽

Abhinay Kumar

Keyword(s):

Moisture Susceptibility ◽

Bituminous Binders

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A Numerical and Experimental Study of Cavitation in a Hot Tensile Axisymmetric Testpiece

The Journal of Strain Analysis for Engineering Design ◽

10.1243/030932405x30768 ◽

2005 ◽

Vol 40 (6) ◽

pp. 571-586 ◽

Cited By ~ 9

Author(s):

Y Liu ◽

J Lin ◽

T. A Dean ◽

D. C. J Farrugia

Keyword(s):

Experimental Study ◽

Flow Stress ◽

Grain Boundary ◽

Thermal Gradient ◽

Tensile Testing ◽

Tensile Deformation ◽

Strain Rates ◽

Test Results ◽

Integrated Technique ◽

Hot Tensile Deformation

During axisymmetric hot tensile testing, necking normally takes place due to the thermal gradient and the accumulation of microdamage. This paper introduces an integrated technique to predict the damage and necking evolution behaviour. Firstly, a set of multiaxial mechanism-based unified viscoplastic-damage constitutive equations is presented. This equation set, which models the evolution of grain boundary (intragranular) and plasticity-induced (intergranular) damage, is determined for a free-cutting steel tested over a range of temperatures and strain rates on a Gleeble thermomechanical simulator. This model has been implemented using the CREEP subroutine of the commercial finite element (FE) solver ABAQUS. Numerical procedures to simulate axisymmetric hot tensile deformation are developed with consideration of the thermal gradient along the axis of the tensile testpiece. FE simulations are carried out to reproduce the necking phenomenon and the evolution of plasticity-induced and grain boundary damage. The simulated results have been validated with experimental tensile test results. The effects of necking and its associated stress state on flow stress and ductility are investigated. The flow stress and ductility data obtained from a Gleeble material simulator under various hot deformation conditions have also been numerically studied.

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Design Go-Kart Chassis Four Strokes 110 Engine

JMIO: Jurnal Mesin Industri dan Otomotif ◽

10.46365/jmio.v2i01.402 ◽

2021 ◽

Vol 2 (1) ◽

pp. 17-20

Author(s):

Misbachuddin

Keyword(s):

Tensile Testing ◽

Testing Machine ◽

Computer Application ◽

Test Results ◽

Welding Wire ◽

Tensile Testing Machine ◽

Elasticity Limit ◽

Steel Pipes ◽

Auto Cad ◽

A Current

This study aimed to decide how to design a kart chassis and the strength of the welded joints. In this design, the chassis frame is made of tubular profile steel, which is designed to withstand most of the loads in a vehicle. The chassis was designed using a computer application, namely Auto CAD 2007. Assembly using carbon steel pipes connected using SMAW welding with E6013 RB 2.6 mm welding wire with a current of 75 A, 1G place. The test is carried out with a tensile testing machine. The material is pulled past the most stretch elasticity limit until finally, the specimen reaches the limit (breaks). The tensile test takes about 3-5 minutes with a load of 10-20N. The test results show the average tensile strength of the iron pipe is 0.512 Mpa.

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Effectiveness of Loaded Wheel Tracking Test to Ascertain Moisture Susceptibility of Asphalt Mixtures

Transportation Research Record Journal of the Transportation Research Board ◽

10.1177/03611981211036355 ◽

2021 ◽

pp. 036119812110363

Author(s):

Moses Akentuna ◽

Louay N. Mohammad ◽

Sanchit Sachdeva ◽

Samuel B. Cooper ◽

Samuel B. Cooper

Keyword(s):

Asphalt Binder ◽

Asphalt Mixture ◽

Moisture Damage ◽

Asphalt Mixtures ◽

Asphalt Binders ◽

Creep Recovery ◽

Moisture Susceptibility ◽

Freeze Thaw ◽

Wheel Tracking ◽

Mixture Samples

Moisture damage of asphalt mixtures is a major distress affecting the durability of asphalt pavements. The loaded wheel tracking (LWT) test is gaining popularity in determining moisture damage because of its ability to relate laboratory performance to field performance. However, the accuracy of LWT’s “pass/fail” criteria for screening mixtures is limited. The objective of this study was to evaluate the capability of the LWT test to identify moisture susceptibility of asphalt mixtures with different moisture conditioning protocols. Seven 12.5 mm asphalt mixtures with two asphalt binder types (unmodified PG 67-22 and modified PG 70-22), and three aggregate types (limestone, crushed gravel, and a semi-crushed gravel) were utilized. Asphalt binder and mixture samples were subjected to five conditioning levels, namely, a control; single freeze–thaw-; triple freeze–thaw-; MiST 3500 cycles; and MiST 7000 cycles. Frequency sweep at multiple temperatures and frequencies, and multiple stress creep recovery tests were performed to evaluate asphalt binders. LWT test was used to evaluate the asphalt mixture samples. Freeze–thaw and MiST conditioning resulted in an increase in stiffness in the asphalt binders as compared with the control. Further, freeze–thaw and MiST conditioning resulted in an increase in rut depth compared with the control asphalt mixture. The conditioning protocols evaluated were effective in exposing moisture-sensitive mixtures, which initially showed compliance with Louisiana asphalt mixture design specifications.

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Characteristics of Films on the Surface of Sea Sand and Effects on the Dissolution of Chloride

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.842.326 ◽

2020 ◽

Vol 842 ◽

pp. 326-336

Author(s):

Fei Long Sun ◽

Shuai Wu ◽

Quan Jiang ◽

Huo Cheng Chen ◽

Hong Yan Guan

Keyword(s):

Chloride Content ◽

Water Soluble ◽

Hot Water ◽

Water Extraction ◽

New Method ◽

Emission Spectrometry ◽

Specimen Preparation ◽

Test Results ◽

Hot Water Extraction ◽

Sea Sand

In this study, the effects of the specimen preparation method, temperature, and duration of the extraction step for the determination of the water-soluble chloride content of sea sand were investigated. The results demonstrated that increasing the heating temperature and duration promoted the dissolution of chloride, where the maximum value was obtained at 80°C and 60 min. Hot water extraction (80°C/60 min) could eliminate the effects of different specimen preparation methods on the final test results. Therefore, a new method was developed with drying at a temperature of 110 ± 5°C and hot water extraction at a temperature of 80°C for 60 min. The suitability of the new method for determining the water-soluble chloride content of sea sand was verified by testing the extracted specimens again. The results indicated that the chloride in sea sand dissolved fully with the new method, and thus it is suitable for testing the water-soluble chloride content of sea sand. Finally, the organic and inorganic compositions of the film adsorbed on the surface of sea sand were studied based on thermogravimetric analysis, inductively coupled plasma atomic emission spectrometry, ion chromatography, and total organic carbon measurements. The results indicated that a layer of substance (a multi-substance film) was adsorbed onto the surface of sea sand. This layer comprised inorganic salts (such as Cl–, Na+, Mg2+, SO42–, and Ca2+) and organic compounds, which were related to the composition of sea water. The multi-substance film greatly affected the dissolution and diffusion of chloride in the sea sand. Hot water extraction accelerated the dissolution of the film and increased the test results in terms of the water-soluble chloride contents.

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Structure and mechanical properties of GR/UHMWPE nanocomposite ropes

E3S Web of Conferences ◽

10.1051/e3sconf/201913101127 ◽

2019 ◽

Vol 131 ◽

pp. 01127

Author(s):

Wen Wen Yu ◽

Jian Gao Shi ◽

Yong Li Liu ◽

Lei Wang

Keyword(s):

Mechanical Properties ◽

Melt Spinning ◽

Mechanical Test ◽

Reactive Extrusion ◽

Breaking Load ◽

Hot Water ◽

Test Results ◽

Screw Extruder ◽

Elongation At Break ◽

Ultra High Molecular Weight

Ultra-high molecular weight polyethylene (UHMWPE) and graphene (GR) was melt compounded by reactive extrusion. Nanocomposite monofilaments were prepared by melt spinning through a co-rotating screw extruder and drawing at hot water. GR/UHMWPE nanocomposite ropes were twisted using nanocomposite monofilaments. A structure and mechanical properties of the GR/UHMWPE nanocomposite monofilaments and its ropes had been characterized by scanning electron microscopy (SEM), and mechanical test. Results showed that the monofilaments surface of monofilaments became rougher with introducing of GR nanosheets, which could be related to stacking of GR. The breaking load of GR/UHMWPE nanocomposite ropes was remarkably improved upon nanofiller addition, with the decrease of the elongation at break.

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